# Ruler msg vs Caliper&Ruler

The clearest difference is in-app purchases: Ruler msg at none against Caliper&Ruler's 1. Ruler msg also leads on iOS requirement (16.1 vs 18.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Caliper&Ruler sells 1 one-off in-app purchase. Ruler msg asks for nothing beyond the download.

Ruler msg ships an update every 5 weeks, Caliper&Ruler every 6 weeks. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Ruler msg | Caliper&Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caliper-and-ruler/id6749051381/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 5 MB |
| Requires iOS | **16.1** | 18.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | +4 |
| Developer | [kenshin miyamoto](https://appshunter.io/developer/1672328137) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Ruler msg

[App page](https://appshunter.io/ios/app/ruler-msg/id6445908328)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caliper&Ruler

[App page](https://appshunter.io/ios/app/caliper-and-ruler/id6749051381)

Transform your device into a precise digital caliper for measuring objects in inches and millimeters. Features intuitive drag-and-measure functionality and accurate screen calibration using common items.

**Highlights:** Dual measurement units (inches/millimeters), Intuitive drag-and-measure interface, Accurate screen calibration, Custom calibration options, Universal device compatibility

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Ruler msg free?

Ruler msg is free to download, with no in-app purchases.

### Is Caliper&Ruler free?

Caliper&Ruler is free to download, with in-app purchases available.

### Do Ruler msg or Caliper&Ruler have ads?

Neither Ruler msg nor Caliper&Ruler shows ads.

### Which is updated more often, Ruler msg or Caliper&Ruler?

Ruler msg ships an update every 5 weeks, and Caliper&Ruler every 6 weeks. Most recently, Ruler msg was updated on September 28, 2026 and Caliper&Ruler on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*